Choose the best option for each gap.

1. There wasn’t ... milk left so I bought some more.

2. There is ... interest in this cutting-edge technology.

3. ... of the students passed the exam.

4. ... did he know that he was being followed.

5. Bobby expressed his gratitude to Ann by sending ... flowers to her office.

6. He didn’t see her again until ... days later.

7. ... to my annoyance, the Internet wouldn’t work just when I needed it most.

8. My sister was up all night studying and didn’t get ... sleep.

9. ... shops are open on Sundays.

10. The patient shows ... sign of memory loss.